/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.tools.idea.uibuilder.editor.multirepresentation

/** An interface to keep track and control current [PreviewRepresentation]. */
interface PreviewRepresentationManager {
  /**
   * A list of available [PreviewRepresentation] names to select from. Name are used as a unique
   * identifier and a display name for the [PreviewRepresentation]
   */
  val representationNames: Collection<RepresentationName>

  /** Name of a currently selected [PreviewRepresentation]. */
  var currentRepresentationName: RepresentationName

  /**
   * Current [PreviewRepresentation], expected to be null if the list of [representationNames] is
   * empty or [currentRepresentationName] is invalid.
   */
  val currentRepresentation: PreviewRepresentation?
}
